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.Dd Mar 18, 2015
.Dt INTRO 5
.Os
.Sh NAME
.Nm Intro ,
.Nm intro
.Nd introduction to file formats and configurations
.Sh DESCRIPTION
This section outlines the formats of various files and configurations of
various subsystems.
The C structure declarations for the file formats are given where applicable.
Usually, the headers containing these structure declarations can be found in the
directories
.Pa /usr/include
or
.Pa /usr/include/sys .
For inclusion in C language programs, however, the syntax
.Sy #include
.Sm off
<
.Em filename.h No >
.Sm on
or
.Sy #include
.Sm off
<
.Sy sys/ Em filename.h No >
.Sm on
should be used.
